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JavaScript Look & feel gemini.google.com

Gemini: deeper dark mode

Deepens the dark background and raises text contrast for easier night-time reading.

Code to copy

// Toggle a deeper dark background with higher text contrast
(function () {
  var id = 'jz-gemini-dark';
  var el = document.getElementById(id);
  if (el) { el.remove(); return; }
  var s = document.createElement('style');
  s.id = id;
  s.textContent = 'body,.chat-container,.conversation-container' +
    '{background:#0d0d10!important;}.markdown,message-content' +
    '{color:#ececec!important;}code-block pre{background:#16161a!important;}';
  document.head.appendChild(s);
})();

How to use this example

  1. Copy the code with the button above.
  2. Install JustZix (2 minutes) and open the extension on the target page.
  3. Add a new rule matching that page.
  4. Paste the code into the rule's JavaScript panel and save — it runs on every page visit.

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